/* 第2套：左侧功能导航 · 双栏 · 暖橙 */
:root {
  --bg: #faf4eb;
  --panel: #fff8ef;
  --ink: #3d2914;
  --orange: #c45c26;
  --orange-deep: #8a3b12;
  --line: #e4d2b8;
  --muted: #7a6248;
  --side: #2b1c10;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
}
a { color: var(--orange-deep); }
.shell {
  display: grid;
  grid-template-columns: 232px 1fr;
  min-height: 100vh;
}
.side {
  background: var(--side);
  color: #f3e6d4;
  padding: 28px 22px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.logo {
  display: block;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
  margin-bottom: 28px;
  letter-spacing: 0.06em;
}
.nav { list-style: none; }
.nav a {
  display: block;
  color: #e7d3bc;
  text-decoration: none;
  padding: 10px 0;
  border-left: 3px solid transparent;
  padding-left: 10px;
}
.nav a.current { color: #fff; border-left-color: var(--orange); }
.side p { font-size: 13px; color: #c9b49a; margin-top: 28px; }
.main { padding: 0 0 40px; }
.hero {
  background: linear-gradient(120deg, #fff1dc 0%, #f7d7b5 100%);
  padding: 40px 48px 36px;
  border-bottom: 3px solid var(--orange);
}
.hero h1 { font-size: 30px; line-height: 1.4; margin-bottom: 14px; max-width: 780px; }
.lead { max-width: 720px; color: var(--muted); margin-bottom: 20px; }
.btn {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  font-weight: 600;
}
.btn-line {
  display: inline-block;
  margin-left: 10px;
  padding: 11px 16px;
  border: 1px solid var(--orange-deep);
  color: var(--orange-deep);
  text-decoration: none;
}
.dl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.dl-row a {
  background: var(--side);
  color: #fff;
  text-decoration: none;
  padding: 8px 12px;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.content { width: min(860px, calc(100% - 80px)); margin: 0 auto; padding-top: 8px; }
.fn {
  margin: 36px 0;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 22px 24px;
}
.fn h2 {
  font-size: 22px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--orange);
}
.fn p { margin-bottom: 12px; }
.fn ul { margin: 0 0 12px 20px; }
.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.pair .fn { margin: 0; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: #fff;
}
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { background: #f0d8b8; }
.faq .fn { background: #fff; }
.faq h3 { font-size: 16px; margin: 14px 0 6px; }
.site-footer {
  background: var(--side);
  color: #e8d7c2;
  padding: 22px 48px 28px;
  font-size: 13px;
}
.site-footer a { color: #ffd7a8; margin-right: 14px; }
.site-footer p { margin-top: 8px; }
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: relative; height: auto; }
  .pair { grid-template-columns: 1fr; }
  .hero, .site-footer { padding-left: 20px; padding-right: 20px; }
  .content { width: calc(100% - 32px); }
}